Commit | Line | Data |
---|---|---|
c906108c | 1 | /* Core dump and executable file functions below target vector, for GDB. |
4646aa9d | 2 | |
197e01b6 | 3 | Copyright (C) 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, |
9353355f | 4 | 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006 |
961cb7b5 | 5 | Free Software Foundation, Inc. |
c906108c | 6 | |
c5aa993b | 7 | This file is part of GDB. |
c906108c | 8 | |
c5aa993b JM |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2 of the License, or | |
12 | (at your option) any later version. | |
c906108c | 13 | |
c5aa993b JM |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
c906108c | 18 | |
c5aa993b JM |
19 | You should have received a copy of the GNU General Public License |
20 | along with this program; if not, write to the Free Software | |
197e01b6 EZ |
21 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
22 | Boston, MA 02110-1301, USA. */ | |
c906108c SS |
23 | |
24 | #include "defs.h" | |
0e24ac5d | 25 | #include "arch-utils.h" |
c906108c SS |
26 | #include "gdb_string.h" |
27 | #include <errno.h> | |
28 | #include <signal.h> | |
29 | #include <fcntl.h> | |
fc24370e MS |
30 | #ifdef HAVE_SYS_FILE_H |
31 | #include <sys/file.h> /* needed for F_OK and friends */ | |
32 | #endif | |
c5aa993b | 33 | #include "frame.h" /* required by inferior.h */ |
c906108c SS |
34 | #include "inferior.h" |
35 | #include "symtab.h" | |
36 | #include "command.h" | |
37 | #include "bfd.h" | |
38 | #include "target.h" | |
39 | #include "gdbcore.h" | |
40 | #include "gdbthread.h" | |
4e052eda | 41 | #include "regcache.h" |
0e24ac5d | 42 | #include "regset.h" |
990f9fe3 | 43 | #include "symfile.h" |
4646aa9d | 44 | #include "exec.h" |
dbda9972 | 45 | #include "readline/readline.h" |
0e24ac5d | 46 | #include "gdb_assert.h" |
60250e8b | 47 | #include "exceptions.h" |
a77053c2 | 48 | #include "solib.h" |
0e24ac5d | 49 | |
8e860359 | 50 | |
ee28ca0f AC |
51 | #ifndef O_LARGEFILE |
52 | #define O_LARGEFILE 0 | |
53 | #endif | |
54 | ||
00e32a35 AC |
55 | /* List of all available core_fns. On gdb startup, each core file |
56 | register reader calls deprecated_add_core_fns() to register | |
57 | information on each core format it is prepared to read. */ | |
c906108c SS |
58 | |
59 | static struct core_fns *core_file_fns = NULL; | |
60 | ||
2acceee2 JM |
61 | /* The core_fns for a core file handler that is prepared to read the core |
62 | file currently open on core_bfd. */ | |
63 | ||
64 | static struct core_fns *core_vec = NULL; | |
65 | ||
0e24ac5d MK |
66 | /* FIXME: kettenis/20031023: Eventually this variable should |
67 | disappear. */ | |
68 | ||
69 | struct gdbarch *core_gdbarch = NULL; | |
70 | ||
a14ed312 | 71 | static void core_files_info (struct target_ops *); |
c906108c | 72 | |
a14ed312 | 73 | static struct core_fns *sniff_core_bfd (bfd *); |
2acceee2 | 74 | |
020cc13c | 75 | static int gdb_check_format (bfd *); |
2acceee2 | 76 | |
a14ed312 | 77 | static void core_open (char *, int); |
c906108c | 78 | |
a14ed312 | 79 | static void core_detach (char *, int); |
c906108c | 80 | |
a14ed312 | 81 | static void core_close (int); |
c906108c | 82 | |
74b7792f AC |
83 | static void core_close_cleanup (void *ignore); |
84 | ||
a14ed312 | 85 | static void get_core_registers (int); |
c906108c | 86 | |
4efb68b1 | 87 | static void add_to_thread_list (bfd *, asection *, void *); |
c906108c | 88 | |
5a168c78 | 89 | static int ignore (CORE_ADDR, bfd_byte *); |
c906108c | 90 | |
39f77062 | 91 | static int core_file_thread_alive (ptid_t tid); |
c906108c | 92 | |
a14ed312 | 93 | static void init_core_ops (void); |
c906108c | 94 | |
a14ed312 | 95 | void _initialize_corelow (void); |
c906108c SS |
96 | |
97 | struct target_ops core_ops; | |
98 | ||
99 | /* Link a new core_fns into the global core_file_fns list. Called on gdb | |
100 | startup by the _initialize routine in each core file register reader, to | |
101 | register information about each format the the reader is prepared to | |
102 | handle. */ | |
103 | ||
104 | void | |
00e32a35 | 105 | deprecated_add_core_fns (struct core_fns *cf) |
c906108c | 106 | { |
c5aa993b | 107 | cf->next = core_file_fns; |
c906108c SS |
108 | core_file_fns = cf; |
109 | } | |
110 | ||
2acceee2 JM |
111 | /* The default function that core file handlers can use to examine a |
112 | core file BFD and decide whether or not to accept the job of | |
113 | reading the core file. */ | |
114 | ||
115 | int | |
fba45db2 | 116 | default_core_sniffer (struct core_fns *our_fns, bfd *abfd) |
2acceee2 JM |
117 | { |
118 | int result; | |
119 | ||
120 | result = (bfd_get_flavour (abfd) == our_fns -> core_flavour); | |
121 | return (result); | |
122 | } | |
123 | ||
124 | /* Walk through the list of core functions to find a set that can | |
125 | handle the core file open on ABFD. Default to the first one in the | |
ee923081 | 126 | list if nothing matches. Returns pointer to set that is |
2acceee2 JM |
127 | selected. */ |
128 | ||
129 | static struct core_fns * | |
fba45db2 | 130 | sniff_core_bfd (bfd *abfd) |
2acceee2 JM |
131 | { |
132 | struct core_fns *cf; | |
133 | struct core_fns *yummy = NULL; | |
134 | int matches = 0;; | |
135 | ||
0e24ac5d MK |
136 | /* Don't sniff if we have support for register sets in CORE_GDBARCH. */ |
137 | if (core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) | |
138 | return NULL; | |
139 | ||
2acceee2 JM |
140 | for (cf = core_file_fns; cf != NULL; cf = cf->next) |
141 | { | |
142 | if (cf->core_sniffer (cf, abfd)) | |
143 | { | |
144 | yummy = cf; | |
145 | matches++; | |
146 | } | |
147 | } | |
148 | if (matches > 1) | |
149 | { | |
8a3fe4f8 | 150 | warning (_("\"%s\": ambiguous core format, %d handlers match"), |
2acceee2 JM |
151 | bfd_get_filename (abfd), matches); |
152 | } | |
153 | else if (matches == 0) | |
154 | { | |
8a3fe4f8 | 155 | warning (_("\"%s\": no core file handler recognizes format, using default"), |
2acceee2 JM |
156 | bfd_get_filename (abfd)); |
157 | } | |
158 | if (yummy == NULL) | |
159 | { | |
160 | yummy = core_file_fns; | |
161 | } | |
162 | return (yummy); | |
163 | } | |
164 | ||
165 | /* The default is to reject every core file format we see. Either | |
166 | BFD has to recognize it, or we have to provide a function in the | |
167 | core file handler that recognizes it. */ | |
168 | ||
169 | int | |
fba45db2 | 170 | default_check_format (bfd *abfd) |
2acceee2 JM |
171 | { |
172 | return (0); | |
173 | } | |
174 | ||
175 | /* Attempt to recognize core file formats that BFD rejects. */ | |
176 | ||
020cc13c | 177 | static int |
fba45db2 | 178 | gdb_check_format (bfd *abfd) |
2acceee2 JM |
179 | { |
180 | struct core_fns *cf; | |
181 | ||
182 | for (cf = core_file_fns; cf != NULL; cf = cf->next) | |
183 | { | |
184 | if (cf->check_format (abfd)) | |
185 | { | |
81a9a963 | 186 | return (1); |
2acceee2 JM |
187 | } |
188 | } | |
81a9a963 | 189 | return (0); |
2acceee2 | 190 | } |
c906108c SS |
191 | |
192 | /* Discard all vestiges of any previous core file and mark data and stack | |
193 | spaces as empty. */ | |
194 | ||
c906108c | 195 | static void |
fba45db2 | 196 | core_close (int quitting) |
c906108c SS |
197 | { |
198 | char *name; | |
199 | ||
200 | if (core_bfd) | |
201 | { | |
39f77062 | 202 | inferior_ptid = null_ptid; /* Avoid confusion from thread stuff */ |
c906108c | 203 | |
7a292a7a | 204 | /* Clear out solib state while the bfd is still open. See |
c5aa993b | 205 | comments in clear_solib in solib.c. */ |
7a292a7a SS |
206 | #ifdef CLEAR_SOLIB |
207 | CLEAR_SOLIB (); | |
a77053c2 MK |
208 | #else |
209 | clear_solib (); | |
7a292a7a SS |
210 | #endif |
211 | ||
c906108c SS |
212 | name = bfd_get_filename (core_bfd); |
213 | if (!bfd_close (core_bfd)) | |
8a3fe4f8 | 214 | warning (_("cannot close \"%s\": %s"), |
c906108c | 215 | name, bfd_errmsg (bfd_get_error ())); |
b8c9b27d | 216 | xfree (name); |
c906108c | 217 | core_bfd = NULL; |
c906108c SS |
218 | if (core_ops.to_sections) |
219 | { | |
b8c9b27d | 220 | xfree (core_ops.to_sections); |
c906108c SS |
221 | core_ops.to_sections = NULL; |
222 | core_ops.to_sections_end = NULL; | |
223 | } | |
224 | } | |
2acceee2 | 225 | core_vec = NULL; |
0e24ac5d | 226 | core_gdbarch = NULL; |
c906108c SS |
227 | } |
228 | ||
74b7792f AC |
229 | static void |
230 | core_close_cleanup (void *ignore) | |
231 | { | |
232 | core_close (0/*ignored*/); | |
233 | } | |
234 | ||
c906108c SS |
235 | /* Look for sections whose names start with `.reg/' so that we can extract the |
236 | list of threads in a core file. */ | |
237 | ||
238 | static void | |
4efb68b1 | 239 | add_to_thread_list (bfd *abfd, asection *asect, void *reg_sect_arg) |
c906108c SS |
240 | { |
241 | int thread_id; | |
242 | asection *reg_sect = (asection *) reg_sect_arg; | |
243 | ||
244 | if (strncmp (bfd_section_name (abfd, asect), ".reg/", 5) != 0) | |
245 | return; | |
246 | ||
247 | thread_id = atoi (bfd_section_name (abfd, asect) + 5); | |
248 | ||
39f77062 | 249 | add_thread (pid_to_ptid (thread_id)); |
c906108c SS |
250 | |
251 | /* Warning, Will Robinson, looking at BFD private data! */ | |
252 | ||
253 | if (reg_sect != NULL | |
c5aa993b | 254 | && asect->filepos == reg_sect->filepos) /* Did we find .reg? */ |
39f77062 | 255 | inferior_ptid = pid_to_ptid (thread_id); /* Yes, make it current */ |
c906108c SS |
256 | } |
257 | ||
258 | /* This routine opens and sets up the core file bfd. */ | |
259 | ||
260 | static void | |
fba45db2 | 261 | core_open (char *filename, int from_tty) |
c906108c SS |
262 | { |
263 | const char *p; | |
264 | int siggy; | |
265 | struct cleanup *old_chain; | |
266 | char *temp; | |
267 | bfd *temp_bfd; | |
268 | int ontop; | |
269 | int scratch_chan; | |
ee28ca0f | 270 | int flags; |
c906108c SS |
271 | |
272 | target_preopen (from_tty); | |
273 | if (!filename) | |
274 | { | |
8a3fe4f8 AC |
275 | if (core_bfd) |
276 | error (_("No core file specified. (Use `detach' to stop debugging a core file.)")); | |
277 | else | |
278 | error (_("No core file specified.")); | |
c906108c SS |
279 | } |
280 | ||
281 | filename = tilde_expand (filename); | |
282 | if (filename[0] != '/') | |
283 | { | |
1754f103 | 284 | temp = concat (current_directory, "/", filename, (char *)NULL); |
b8c9b27d | 285 | xfree (filename); |
c906108c SS |
286 | filename = temp; |
287 | } | |
288 | ||
b8c9b27d | 289 | old_chain = make_cleanup (xfree, filename); |
c906108c | 290 | |
ee28ca0f AC |
291 | flags = O_BINARY | O_LARGEFILE; |
292 | if (write_files) | |
293 | flags |= O_RDWR; | |
294 | else | |
295 | flags |= O_RDONLY; | |
296 | scratch_chan = open (filename, flags, 0); | |
c906108c SS |
297 | if (scratch_chan < 0) |
298 | perror_with_name (filename); | |
299 | ||
9f76c2cd MM |
300 | temp_bfd = bfd_fopen (filename, gnutarget, |
301 | write_files ? FOPEN_RUB : FOPEN_RB, | |
302 | scratch_chan); | |
c906108c SS |
303 | if (temp_bfd == NULL) |
304 | perror_with_name (filename); | |
305 | ||
2acceee2 JM |
306 | if (!bfd_check_format (temp_bfd, bfd_core) && |
307 | !gdb_check_format (temp_bfd)) | |
c906108c SS |
308 | { |
309 | /* Do it after the err msg */ | |
310 | /* FIXME: should be checking for errors from bfd_close (for one thing, | |
c5aa993b JM |
311 | on error it does not free all the storage associated with the |
312 | bfd). */ | |
5c65bbb6 | 313 | make_cleanup_bfd_close (temp_bfd); |
8a3fe4f8 | 314 | error (_("\"%s\" is not a core dump: %s"), |
c906108c SS |
315 | filename, bfd_errmsg (bfd_get_error ())); |
316 | } | |
317 | ||
318 | /* Looks semi-reasonable. Toss the old core file and work on the new. */ | |
319 | ||
c5aa993b | 320 | discard_cleanups (old_chain); /* Don't free filename any more */ |
c906108c SS |
321 | unpush_target (&core_ops); |
322 | core_bfd = temp_bfd; | |
74b7792f | 323 | old_chain = make_cleanup (core_close_cleanup, 0 /*ignore*/); |
c906108c | 324 | |
0e24ac5d MK |
325 | /* FIXME: kettenis/20031023: This is very dangerous. The |
326 | CORE_GDBARCH that results from this call may very well be | |
327 | different from CURRENT_GDBARCH. However, its methods may only | |
328 | work if it is selected as the current architecture, because they | |
329 | rely on swapped data (see gdbarch.c). We should get rid of that | |
330 | swapped data. */ | |
331 | core_gdbarch = gdbarch_from_bfd (core_bfd); | |
332 | ||
2acceee2 JM |
333 | /* Find a suitable core file handler to munch on core_bfd */ |
334 | core_vec = sniff_core_bfd (core_bfd); | |
335 | ||
c906108c SS |
336 | validate_files (); |
337 | ||
338 | /* Find the data section */ | |
339 | if (build_section_table (core_bfd, &core_ops.to_sections, | |
340 | &core_ops.to_sections_end)) | |
8a3fe4f8 | 341 | error (_("\"%s\": Can't find sections: %s"), |
c906108c SS |
342 | bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ())); |
343 | ||
2f1b5984 MK |
344 | /* If we have no exec file, try to set the architecture from the |
345 | core file. We don't do this unconditionally since an exec file | |
346 | typically contains more information that helps us determine the | |
347 | architecture than a core file. */ | |
348 | if (!exec_bfd) | |
349 | set_gdbarch_from_file (core_bfd); | |
cbda0a99 | 350 | |
c906108c SS |
351 | ontop = !push_target (&core_ops); |
352 | discard_cleanups (old_chain); | |
353 | ||
20d2ca3e AC |
354 | /* This is done first, before anything has a chance to query the |
355 | inferior for information such as symbols. */ | |
9353355f | 356 | post_create_inferior (&core_ops, from_tty); |
20d2ca3e | 357 | |
c906108c SS |
358 | p = bfd_core_file_failing_command (core_bfd); |
359 | if (p) | |
a3f17187 | 360 | printf_filtered (_("Core was generated by `%s'.\n"), p); |
c906108c SS |
361 | |
362 | siggy = bfd_core_file_failing_signal (core_bfd); | |
363 | if (siggy > 0) | |
8e6a3c35 | 364 | /* NOTE: target_signal_from_host() converts a target signal value |
e26cc349 | 365 | into gdb's internal signal value. Unfortunately gdb's internal |
8e6a3c35 AC |
366 | value is called ``target_signal'' and this function got the |
367 | name ..._from_host(). */ | |
a3f17187 | 368 | printf_filtered (_("Program terminated with signal %d, %s.\n"), siggy, |
8e6a3c35 | 369 | target_signal_to_string (target_signal_from_host (siggy))); |
c906108c SS |
370 | |
371 | /* Build up thread list from BFD sections. */ | |
372 | ||
373 | init_thread_list (); | |
374 | bfd_map_over_sections (core_bfd, add_to_thread_list, | |
375 | bfd_get_section_by_name (core_bfd, ".reg")); | |
376 | ||
377 | if (ontop) | |
378 | { | |
379 | /* Fetch all registers from core file. */ | |
380 | target_fetch_registers (-1); | |
381 | ||
c906108c SS |
382 | /* Now, set up the frame cache, and print the top of stack. */ |
383 | flush_cached_frames (); | |
0f7d239c | 384 | select_frame (get_current_frame ()); |
b04f3ab4 | 385 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); |
c906108c SS |
386 | } |
387 | else | |
388 | { | |
389 | warning ( | |
c5aa993b | 390 | "you won't be able to access this core file until you terminate\n\ |
c906108c SS |
391 | your %s; do ``info files''", target_longname); |
392 | } | |
393 | } | |
394 | ||
395 | static void | |
fba45db2 | 396 | core_detach (char *args, int from_tty) |
c906108c SS |
397 | { |
398 | if (args) | |
8a3fe4f8 | 399 | error (_("Too many arguments")); |
c906108c SS |
400 | unpush_target (&core_ops); |
401 | reinit_frame_cache (); | |
402 | if (from_tty) | |
a3f17187 | 403 | printf_filtered (_("No core file now.\n")); |
c906108c SS |
404 | } |
405 | ||
de57eccd JM |
406 | |
407 | /* Try to retrieve registers from a section in core_bfd, and supply | |
408 | them to core_vec->core_read_registers, as the register set numbered | |
409 | WHICH. | |
410 | ||
39f77062 KB |
411 | If inferior_ptid is zero, do the single-threaded thing: look for a |
412 | section named NAME. If inferior_ptid is non-zero, do the | |
de57eccd | 413 | multi-threaded thing: look for a section named "NAME/PID", where |
39f77062 | 414 | PID is the shortest ASCII decimal representation of inferior_ptid. |
de57eccd JM |
415 | |
416 | HUMAN_NAME is a human-readable name for the kind of registers the | |
417 | NAME section contains, for use in error messages. | |
418 | ||
419 | If REQUIRED is non-zero, print an error if the core file doesn't | |
420 | have a section by the appropriate name. Otherwise, just do nothing. */ | |
421 | ||
422 | static void | |
423 | get_core_register_section (char *name, | |
424 | int which, | |
425 | char *human_name, | |
426 | int required) | |
427 | { | |
3ecda457 | 428 | static char *section_name = NULL; |
7be0c536 | 429 | struct bfd_section *section; |
de57eccd JM |
430 | bfd_size_type size; |
431 | char *contents; | |
432 | ||
3ecda457 | 433 | xfree (section_name); |
39f77062 | 434 | if (PIDGET (inferior_ptid)) |
3ecda457 | 435 | section_name = xstrprintf ("%s/%d", name, PIDGET (inferior_ptid)); |
de57eccd | 436 | else |
3ecda457 | 437 | section_name = xstrdup (name); |
de57eccd JM |
438 | |
439 | section = bfd_get_section_by_name (core_bfd, section_name); | |
440 | if (! section) | |
441 | { | |
442 | if (required) | |
8a3fe4f8 | 443 | warning (_("Couldn't find %s registers in core file."), human_name); |
de57eccd JM |
444 | return; |
445 | } | |
446 | ||
447 | size = bfd_section_size (core_bfd, section); | |
448 | contents = alloca (size); | |
449 | if (! bfd_get_section_contents (core_bfd, section, contents, | |
450 | (file_ptr) 0, size)) | |
451 | { | |
8a3fe4f8 | 452 | warning (_("Couldn't read %s registers from `%s' section in core file."), |
de57eccd JM |
453 | human_name, name); |
454 | return; | |
455 | } | |
456 | ||
0e24ac5d MK |
457 | if (core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) |
458 | { | |
459 | const struct regset *regset; | |
460 | ||
461 | regset = gdbarch_regset_from_core_section (core_gdbarch, name, size); | |
462 | if (regset == NULL) | |
463 | { | |
464 | if (required) | |
8a3fe4f8 | 465 | warning (_("Couldn't recognize %s registers in core file."), |
0e24ac5d MK |
466 | human_name); |
467 | return; | |
468 | } | |
469 | ||
470 | regset->supply_regset (regset, current_regcache, -1, contents, size); | |
471 | return; | |
472 | } | |
473 | ||
474 | gdb_assert (core_vec); | |
e2544d02 | 475 | core_vec->core_read_registers (contents, size, which, |
de57eccd JM |
476 | ((CORE_ADDR) |
477 | bfd_section_vma (core_bfd, section))); | |
478 | } | |
479 | ||
480 | ||
c906108c SS |
481 | /* Get the registers out of a core file. This is the machine- |
482 | independent part. Fetch_core_registers is the machine-dependent | |
483 | part, typically implemented in the xm-file for each architecture. */ | |
484 | ||
485 | /* We just get all the registers, so we don't use regno. */ | |
486 | ||
c906108c | 487 | static void |
fba45db2 | 488 | get_core_registers (int regno) |
c906108c | 489 | { |
de57eccd | 490 | int status; |
c906108c | 491 | |
0e24ac5d MK |
492 | if (!(core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) |
493 | && (core_vec == NULL || core_vec->core_read_registers == NULL)) | |
c906108c SS |
494 | { |
495 | fprintf_filtered (gdb_stderr, | |
c5aa993b | 496 | "Can't fetch registers from this type of core file\n"); |
c906108c SS |
497 | return; |
498 | } | |
499 | ||
de57eccd JM |
500 | get_core_register_section (".reg", 0, "general-purpose", 1); |
501 | get_core_register_section (".reg2", 2, "floating-point", 0); | |
502 | get_core_register_section (".reg-xfp", 3, "extended floating-point", 0); | |
c906108c | 503 | |
2b9e5f3f | 504 | deprecated_registers_fetched (); |
c906108c SS |
505 | } |
506 | ||
c906108c | 507 | static void |
fba45db2 | 508 | core_files_info (struct target_ops *t) |
c906108c SS |
509 | { |
510 | print_section_info (t, core_bfd); | |
511 | } | |
e2544d02 RM |
512 | \f |
513 | static LONGEST | |
514 | core_xfer_partial (struct target_ops *ops, enum target_object object, | |
961cb7b5 MK |
515 | const char *annex, gdb_byte *readbuf, |
516 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) | |
e2544d02 RM |
517 | { |
518 | switch (object) | |
519 | { | |
520 | case TARGET_OBJECT_MEMORY: | |
521 | if (readbuf) | |
c8e73a31 AC |
522 | return (*ops->deprecated_xfer_memory) (offset, readbuf, len, |
523 | 0/*write*/, NULL, ops); | |
e2544d02 | 524 | if (writebuf) |
c8e73a31 AC |
525 | return (*ops->deprecated_xfer_memory) (offset, readbuf, len, |
526 | 1/*write*/, NULL, ops); | |
e2544d02 RM |
527 | return -1; |
528 | ||
529 | case TARGET_OBJECT_AUXV: | |
530 | if (readbuf) | |
531 | { | |
532 | /* When the aux vector is stored in core file, BFD | |
533 | represents this with a fake section called ".auxv". */ | |
534 | ||
c4c5b7ba | 535 | struct bfd_section *section; |
e2544d02 RM |
536 | bfd_size_type size; |
537 | char *contents; | |
538 | ||
539 | section = bfd_get_section_by_name (core_bfd, ".auxv"); | |
540 | if (section == NULL) | |
541 | return -1; | |
542 | ||
543 | size = bfd_section_size (core_bfd, section); | |
544 | if (offset >= size) | |
545 | return 0; | |
546 | size -= offset; | |
547 | if (size > len) | |
548 | size = len; | |
403e1656 MK |
549 | if (size > 0 |
550 | && !bfd_get_section_contents (core_bfd, section, readbuf, | |
551 | (file_ptr) offset, size)) | |
e2544d02 | 552 | { |
8a3fe4f8 | 553 | warning (_("Couldn't read NT_AUXV note in core file.")); |
e2544d02 RM |
554 | return -1; |
555 | } | |
556 | ||
557 | return size; | |
558 | } | |
559 | return -1; | |
560 | ||
403e1656 MK |
561 | case TARGET_OBJECT_WCOOKIE: |
562 | if (readbuf) | |
563 | { | |
564 | /* When the StackGhost cookie is stored in core file, BFD | |
565 | represents this with a fake section called ".wcookie". */ | |
566 | ||
567 | struct bfd_section *section; | |
568 | bfd_size_type size; | |
569 | char *contents; | |
570 | ||
571 | section = bfd_get_section_by_name (core_bfd, ".wcookie"); | |
572 | if (section == NULL) | |
573 | return -1; | |
574 | ||
575 | size = bfd_section_size (core_bfd, section); | |
576 | if (offset >= size) | |
577 | return 0; | |
578 | size -= offset; | |
579 | if (size > len) | |
580 | size = len; | |
581 | if (size > 0 | |
582 | && !bfd_get_section_contents (core_bfd, section, readbuf, | |
583 | (file_ptr) offset, size)) | |
584 | { | |
8a3fe4f8 | 585 | warning (_("Couldn't read StackGhost cookie in core file.")); |
403e1656 MK |
586 | return -1; |
587 | } | |
588 | ||
589 | return size; | |
590 | } | |
591 | return -1; | |
592 | ||
e2544d02 RM |
593 | default: |
594 | if (ops->beneath != NULL) | |
595 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, | |
596 | readbuf, writebuf, offset, len); | |
597 | return -1; | |
598 | } | |
599 | } | |
600 | ||
c906108c SS |
601 | \f |
602 | /* If mourn is being called in all the right places, this could be say | |
603 | `gdb internal error' (since generic_mourn calls breakpoint_init_inferior). */ | |
604 | ||
605 | static int | |
5a168c78 | 606 | ignore (CORE_ADDR addr, bfd_byte *contents) |
c906108c SS |
607 | { |
608 | return 0; | |
609 | } | |
610 | ||
611 | ||
612 | /* Okay, let's be honest: threads gleaned from a core file aren't | |
613 | exactly lively, are they? On the other hand, if we don't claim | |
614 | that each & every one is alive, then we don't get any of them | |
615 | to appear in an "info thread" command, which is quite a useful | |
616 | behaviour. | |
c5aa993b | 617 | */ |
c906108c | 618 | static int |
39f77062 | 619 | core_file_thread_alive (ptid_t tid) |
c906108c SS |
620 | { |
621 | return 1; | |
622 | } | |
623 | ||
624 | /* Fill in core_ops with its defined operations and properties. */ | |
625 | ||
626 | static void | |
fba45db2 | 627 | init_core_ops (void) |
c906108c SS |
628 | { |
629 | core_ops.to_shortname = "core"; | |
630 | core_ops.to_longname = "Local core dump file"; | |
631 | core_ops.to_doc = | |
632 | "Use a core file as a target. Specify the filename of the core file."; | |
633 | core_ops.to_open = core_open; | |
634 | core_ops.to_close = core_close; | |
635 | core_ops.to_attach = find_default_attach; | |
c906108c | 636 | core_ops.to_detach = core_detach; |
c906108c | 637 | core_ops.to_fetch_registers = get_core_registers; |
e2544d02 | 638 | core_ops.to_xfer_partial = core_xfer_partial; |
c8e73a31 | 639 | core_ops.deprecated_xfer_memory = xfer_memory; |
c906108c SS |
640 | core_ops.to_files_info = core_files_info; |
641 | core_ops.to_insert_breakpoint = ignore; | |
642 | core_ops.to_remove_breakpoint = ignore; | |
643 | core_ops.to_create_inferior = find_default_create_inferior; | |
c906108c | 644 | core_ops.to_thread_alive = core_file_thread_alive; |
c906108c SS |
645 | core_ops.to_stratum = core_stratum; |
646 | core_ops.to_has_memory = 1; | |
647 | core_ops.to_has_stack = 1; | |
648 | core_ops.to_has_registers = 1; | |
c5aa993b | 649 | core_ops.to_magic = OPS_MAGIC; |
c906108c SS |
650 | } |
651 | ||
652 | /* non-zero if we should not do the add_target call in | |
653 | _initialize_corelow; not initialized (i.e., bss) so that | |
654 | the target can initialize it (i.e., data) if appropriate. | |
655 | This needs to be set at compile time because we don't know | |
656 | for sure whether the target's initialize routine is called | |
657 | before us or after us. */ | |
658 | int coreops_suppress_target; | |
659 | ||
660 | void | |
fba45db2 | 661 | _initialize_corelow (void) |
c906108c SS |
662 | { |
663 | init_core_ops (); | |
664 | ||
665 | if (!coreops_suppress_target) | |
666 | add_target (&core_ops); | |
667 | } |